I am going to laugh so hard if one day just one fateful day, the
super packed train got this joker got infected .. I wanna see how
they tackle the issue.
It's one bloody common sense that the lesser the ppl is in the
train, the lesser chance that a big amount of ppl will get
infected.
Textbook solution.
To reduce the risk of infections, pack more people into the
carriages.
Don't ask me from which textbook. 
